SITRANS FUS380 Two Track Flowmeter

  • Accuracy +/- 0.5% of flow rate
  • Range of Sizes Available Nominal sizes from DN50 to DN1200 (2 - 48 inch) available
  • Choice of Power Options Can be supplied as a battery or mains powered flow meter
  • Ideal for Energy Measurement Can be combined with FUE950 to provide high resolution energy measurement
Product Options


The 2-track SITRANS FUS380 flowmeter can be supplied as a battery or mains-powered unit and is designed to measure water flow in local networks, boiler stations, substations, chiller plants and other general water applications. The type-approved flowmeter version is named SITRANS FUE380. Technically, the SITRANS FUS380 and SITRANS FUE380 are completely identical, with the only difference being the calibration limit and the type approval for custody transfer.

The 2-track design of the FUS 380 ensures maximum accuracy under short inlet conditions. The flowmeter consists of a flow sensor pipe, 4 transducers/transducer cables and a SITRANS FUS080 transmitter. When ordering a compact version the transducer cables are pre-mounted and ready for installation. Compact mounting is only possible up to 120 °C (248 °F). The sensor must be isolated to protect the transmitter from heat. The unit is available in a compact or a remote version with up to 30 meter distance from flowmeter to transmitter.

The flowmeter digital output is often used as input for an energy meter or as input for digital systems for remote reading. SITRANS FUS380 has two digital output functions that can be individually selected, and optional MODBUS RTU communication modules. Pulse output rate is defined when ordering. If the flowmeter forms part of an energy meter system for custody transfer, no further approvals are needed, except possible local approvals on the flowmeter

The FUS380 is available in an IP67/NEMA 4X/6 enclosure.The main application for the transmitter is measurement of water flow in heat meter system or chilled water.


  • Battery-powered up to 6 years
  • Fast measuring frequency 20 Hz/0.5 Hz (230 V AC/Battery)
  • Easy one-button straight forward display
  • 115/230 V mains-powered with back-up battery option in case of mains power failure
  • 2-track measuring principle for optimum accuracy
  • Compact or remote mounting
  • Measures on all district water qualities and water conductivities
  • No pressure drop
  • Long-term stability
  • Dynamic range Qmin:Qmax up to 1:400
  • MODBUS RTU/RS 232, RS 485
  • 2 galvanically isolated digital outputs for easy connection to a calculator (potential-free)
  • Bidirectional measurement, with 2 totalizers and outputs

Manufactured by: Siemens-Milltronics
Model: SITRANS FUS380 Two Track Flowmeter

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Heating plants
Boiler stations
Local networks
Chiller plants
Other general water applications


Measuring Range Qp 15 to 36000 m3/h (depends on size)
Nominal Size From DN 50 to DN 1200 (2" to 48")
Accuracy ±0.5% of flow rate
Operational Pressure Pressure rate max. PN 40
Operation Temperature From 0 to 60 °C (32 to 140 °F)
Medium Temperature From 2 to 200 °C (35.6 to 392 °F)
Bronze: Up to 150 °C (302 °F)
Design 2-track sensor with flanges and integrated transducers
Material Carbon steel
Bronze (only DN 50 to 80)


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